Metal tubes



(No Model.) 3 SheetsSheet 1.

P. DEMING. CASTING METAL TUBES.

No. 581,272. Patented Apr 27, 1897.

3 SheetsSl1eet 2.

(No Model.)

F DEMING CASTING METAL TUBES.

INVENTOR I'M-D "'9' Hill I Has ATTORNEY (No Model.) 3 Sheets-Sheet 3.

P. DEMING.

CASTING METAL TUBES.

No. 581,272. Patented Apr. 27, 189 7.

WITNESSES: I INVENTOR 71 M ATTORNEY n4: nonms PETERS co. Pnoraumu. wnsulnn'mu. u. c.

UNITED STATES PATENT FFICE.

FERDINAND DEMING, OF WVATERBURY, CONNECTICUT, ASSIGNOR, BY

- MESNE ASSIGNMENTS, TO GEORGE H. CLONES, OF SAME PLACE.

CASTING METAL TUBES.

SPECIFICATION forming part Of Letters Patent NO. 581,272, dated April 27, 1897.

Application filed April 26, 1895. Serial No. 547,283. (No model.)

To all whom zit may concern:

Be it known that I, FERDINAND DEMING, of Waterbury. in the county of New Haven and State of Connecticut, have invented a certain new and useful Improvement in Casting Metal Tubes, of which the following is a specification.

It is desirable for certain purposes to cast metal in tubular form. This is notably so for producing tubular or hollow ingots, such as are commonly used where tubes are to be produced by drawing.

My invention involves the use of a mold which is rotated at a rapid speed, so that metal introduced. into it will be caused to move outward by centrifugal force. When this mold is arranged horizontally, the metal may be more uniformly distributed, so as to make a tubular or hollow ingot of uniform thickness, because the centrifugal force will greatly predominate over the force of gravity, whereas if the mold were arranged in a vertical position the centrifugal force would not be so effective in counteracting the force of gravity, and hence a longitudinally-tapering tubular or hollow ingot would be produced.

My invention also involves the combination, with such a mold of a receiving-chamber and a piston for discharging molten metal from the receiving-chamber into the mold.

The invention also involves other features, which will be described in detail, and pointed out in claims.

In the accompanying drawings, Figure 1 is partly a side elevation and partly a vertical longitudinal section of an apparatus embody ing my improvement. Fig. 2 is a top View of the same. Fig. 3 is an elevation illustratinga modification. Fig. 4 is'adiagrammatic view of the piping and valves comprised in the apparatus.

Similar letters of reference designate corresponding parts in all the figures.

A designates the mold. It may be made of any suitable materialas, for instance, cast iron or steel. As shown, it is made in the form of a cylindrical tube from one end to the other, but is provided with a flange a at one end. This flange a is secured by bolts a or otherwise to a similar flange b, extending from a tubular or hollow rotary spindle B. The unflanged end of the mold Amay be supported by an underneath bearing C, erected upon the bed-plate D of the apparatus.

On the bed-plate D are erected standards E E furnished with bearings for supporting the spindle B. Between these bearings the spindle B is provided with a belt-pulley B, through which rotary motion may be imparted to the spindle and hence to the mold. Any other means may be employed for rotating the spindle.

F designates a receiving-chamber for molten metal. Like the moldAit is horizontally arranged, and may consist of a cylindrical tube. Internally it is of the same cross-section as the mold. It is made with both ends open. Near one end it is provided with a filling-mouth f, which preferably will be on the upper side. Normally the receiving-chamber is closed at the ends by two pistons F F Molten metal may then be introduced through the filling-mouth f until the entire chamber between the pistons shall have been filled. After this motion will be imparted to the two pistons, so that they will remove the charge of metal into the mold.

As the chamber F is intended to be filled with molten metal and the mold is only intended to have a lining or tube of molten metal within it the mold will be much longer thanthe chamber. Because of this the two pistons F F have different ranges of motion, the piston F moving much greater distance than the piston F, it being intended that the piston F shall move to the flanged end of the mold, so as to close that end, and that the piston F shall merely-be moved to that end of the receiving-chamber F which is contiguous to the mold without entering the mold.

It is intended that the mold A shall be rotated at a high rate of speed at the time of the entrance of the molten metal and until the metal has set sufiiciently to form a tubular or hollow ingot, which happens almost instantly after the introduction of the metal.

The pistons may be so driven that both will reach their final positions at the same time. Of course this will necessitate a much faster movement of the piston F than that of the piston F.

The receiving-chamber serves the purpose of a measuring-chamber and determines exactly the amount of metal which it is desirable to form into a tubular or hollow ingot. Thus the thickness of the wall of the casting will be regulated.

It is important to introduce the molten metal into the mold in as large a body as can conveniently be done, and this is accomplished by the combination of receiving-chamber F and pistons F F. The receiving chamber is shown as being supported upon a block F affixed to the bed-plate D.

I will now describe a means which I have devised for imparting the desired movements to the pistons F F The piston F is connected with a rod f that passes through the mold A while this piston occupies its normal position in the end of the mold adjacent to the receiving-chamber F and thence through the tubular or hollow spindle B. The pistonrod f after passing beyond the spindle, passes through a stuifing-box 9 into the cylinder G of a hydraulic engine, it being connected wit-hin the cylinder to a piston G. The cylinder G is of course long enough to permit of the desired range of movement being imparted to the piston F 2 of the receiving chamber and mold. The cylinder G is supported in standards g 9 erected upon the bed-plate D of the machine. These standards may be secured together by tie-bolts, and the standards g maybe thus connected with the standards E The piston F is affixedto a rod f, that passes through a stuffing-box h into the cylinder II of a hydraulic engine, and within such cylinder is connected to a piston II. The cylinder H is supported by standards h 7Z2, erected upon the bed-plate D of the machine. Tie-bolts may unite these standards and connect the standard it with the block F that supports the receiving-chamber F.

From the outer end of the cylinder G extends a pipe I, and from the outer end of the cylinder H extends a pipe 1 Both these pipes are connected with the chest or casing of a valve of any suitable character, as, for instance, a valve I. From the inner end of the cylinder G a pipe I extends to the valve chest or casing of another valve 1 From cylinder H a pipe 1 also extends to the valve chest or casing of the valve 1 Exhaust or waste ports are used in connection with the valves I and I and enter the waste-pipe I Pressure-pipes I 2' enter valve chests or casings of the valves I and I While the mold A is rotated and the pistons F F are in their normal positions at the ends of the chamber F, the valves I I are set as illustrated in Fig. i, the outer ends of the cylinders G and H being in communication through the pipes I 1 under control of valve I. While the parts are in these positions and the mold is still rotating, the molten metal is introduced into the chamber F, and the motive agent from the pipe i passing through the valve chest or casing of the valve I in to the pipe 1 forces the piston G toward the right, thus producing a similar movement of the piston F Any water or other motive agent which may have previously been left in the cylinder 1-1 new escapes through the pipe I the passage-way in the valve which has brought the pipe 1 into communication with the waste'pipe, and into the waste-pipe I As the cylinders H and G are in communication the piston 11 will travel to the right when the piston G travels to the right, although less rapidly than the piston G, but arriving at the end of its stroke at the same time as the piston G terminates its stroke. Thus the metal will be distributed within the mold, comparatively speaking, in a body or mass and will be deposited around the inner wall of the mold in a thickness proportional to the amount of molten metal introduced. The valve I is now adjusted to open the pipe I to the waste-pipe I and valve I is adjusted to put pipe 1 in communication with pipe l and pipe I in communication with pipe 2'. Fluid under pressure is then admitted through the pipe I from pipe i forcing the piston 11 to the left and thus withdrawing the piston F from the chamber F. The chamber F is then moved to one side and the ingot is pushed out of the mold by piston F which is moved through the mold A by piston G, actuated by fluid under pressure from the supply-pipe I through the valve chest or casing of the valve I, passing to cylinder G through pipe I.

To permit of the expulsion of the ingot from the mold, the receiving-chamber is made movable upon the supporting-block F. As here shown, it is fitted to slide transversely across the block, and it may be adjusted by a lever or by a rack and pinion J J After the expulsion of the ingot the receiving-chamber will be adjusted to its normal position and the pistons G II will be operated so as to move the pistons F F into position to close the end portions of the receivingchamber.

My invention is peculiarly adapted to the casting of ingots of copper and brass, but is applicable to other metals. If used for steel, the receiving-chamber and the mold will of course have to be suitably lined or surfaced internally.

In Fig. 3 the parts are substantially the same as in the first example of my improve ment, but there is no receiving-chamber, and instead there is a large funnel L. Besides this the piston F and the cylinder H and piston H are omitted and the piston F is never moved out of the mold. V

I11 each example of my invention it will be seen that there is a piston which retards the flow of molten metal into the mold, so that it will enter the mold in a body, or, in other words, in a mass, as distinguished from flowing along one portion.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination with a rotary mold, of two pistons and means for longitudinally moving said pistons into position to form the end walls of said mold, substantially as specified.

2. The combination with a rotary mold, of two pistons, means for longitudinally moving said pistons together into position to form the end walls of the mold, and means for returning said pistons independently of each other, substantially as specified.

3. The combination with a mold, of means for rotating the same, a chamber at one end of the mold two pistons closing the ends of the chamber and means for moving the pistons along the chamber and for moving one of them into the mold, so that molten metal will be moved from the chamber into the mold.

4:. The combination of a rotatory mold, having a movable end wall as a piston, a receiving-chamber, a piston in said chamber and means for actuating this latter piston to move a mass of molten metal from the chamber into the mold, substantially as specified.

5. The combination of a rotatory mold, a piston movable lengthwise of the mold, a receiving-chamber, a piston in said chamber, and means for causing a differential movement of the pistons to move a mass of molten metal from the chamber into the mold and to simultaneously cause an increase in the volfor causing a relative transverse movement between the mold and chamber, substantially as specified.

7. The combination with a mold and means for rotating the same, of a chamber located at one end of the mold from which chamber molten metal passes to the mold, a piston movable lengthwise of the mold for ejecting a casting therefrom, and means for causing a relative transverse movement between the mold and the chamber, substantially as specified.

. In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FERDINAND DEMING.

Witnesses:

CHARLES A. OoTTER, CYRUS G. BEACH. 

